Chemistry, 16.11.2019 09:31 taiyana74

Consider the balanced equation below. 4nh3 + 3o2 2n2 + 6h2o what is the mole ratio of nh3 to n2?

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Answer from: kaylaelaine18

Explanation:

A chemical reaction equation that contains same number of atoms on both reactant and product side is known as a balanced equation.

For example, $4NH_{3} + 3O_{2} \rightarrow 2N_{2} + 6H_{2}O$

Here, number of nitrogen atoms on both reactant and product side is 4.

Number of hydrogen atoms on both reactant and product side is 12.

Number of oxygen atoms on both reactant and product side is 6.

Since, there are 4 moles $NH_{3}$ and 2 moles of $N_{2}$ .

Therefore, we can conclude that mole ration of $NH_{3}$ to $N_{2}$ is 4:2 which is equal to 2:1.

Answer from: Quest

assuming that your periodic table has eighteen columns, you should highlight the four elements in the third column from the left of the table.

explanation

neutral atoms of elements after calcium contain d electrons. the energy of d orbitals of a particular main shell lies between the energy of the s and p orbitals of the next main shell. for example, electrons in the $3d$ have energy higher than those in the $4 s$ orbital while lower than those of the $4 p$ orbital.

by the aufbau principle, electrons fill orbitals one at a time, starting from those of the lowest energy. the $4s$ orbital is therefore filled right after $3p$ orbitals and before $3 d$ orbitals.

potassium has electron configuration $[\text{ar}] 4 s^{1}$ and calcium $[\text{ar}] 4 s^{2}$ . the s orbital of a main shell holds a maximum of two electrons. the next element would thus have the electron configuration $[\text{ar}] 4 s^{2} \; 3d^{1}$ and satisfy the requirements.

a neutral atom of the element contains three electrons on top of the most recent noble gas element. it should thus be placed in the third column of the periodic table. both scandium and yttrium would satisfy the conditions. an aufbau diagram indicates that the 4f orbital is filled before the 5d. however, it appears that exceptions exists for both lanthanum and actinium. neutral atoms of the two d-block elements also demonstrate the $ns^{2} \; (n-1) p^{1}$ and should be highlighted as well.

Answer from: Quest

Wow that a lot of text for my tiny so i no wanna answer

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